Definition: In this task, you are given an input list A. You need to convert all the alphabets in the list with a number representing their position in the English alphabet. E.g., replace A by 1, B by 2, a by 1, b by 2, and so on.
Input: ['8723', 'q', '4561', 'n', '4987', '7031', '8873']

8723, 17, 4561, 14, 4987, 7031, 8873